A research program is conducted to assess the mechano-chemical interaction in environment cracking. A joint action mechanism of anodic dissolution (AD) and hydrogen embrittlement (HE) is proposed. Owing to the acidified environment at the crack tip, simultaneously with the dissolution of material, the hydrogen moves into matrix at CF crack tip. The mechanism of CF crack growth depends on the degree of hydrogen entrance. The mechanism of CF crack growth is controlled by the dominant role of AD, or HE (when hydrogen content in the local zone at the crack tip reaches the critical value), or joint action of AD and HE. The mechanism was clarified by a series of experiments. The interaction between AD, HE and mechanical processes in environment cracking is studied in detail.
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